Features: brand new and high quality This high power module is an add-on heated bed power expansion module for 3D printer. Excellent performance MOS tube (nominal maximum current 280A). It can be directly controlled by the hot bed output signal of Ramp1.4 and MKS series motherboards. Made of high quality material, it is durable and long lasting use. Large heat sink, the maximum current can be up to 30A or more. 5-24v digital signal control can be used. Specifications: Item Type: MOSFET Material: PCB-board +Aluminum Color: Red Size: Pls See the Pictures Power Supply: 5V-24V Usage: for TEVO 3D printer parts Instructions: 1. Connect Power to the power supply, pay attention to the positive and negative. 2. Connect Hotbed to the heating line of the hot bed, pay attention to the positive and negative. 3. Direct digital control signal can be connected to Gnd and D8. 4. Connect the control signal output from Ramps1.4 or MKS motherboard MOS tube to -Bed+. 5. Two sets of control signals can only be connected to one set. Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x MOS Module